??????????1?7? ???????????,?6.8?????,????????????,????????????

?????????,????????????????????10????????????1??;10~20???????1???;20~50?????????????????????4?????????4??????????????????1?7?10??43?,????????????????

?????????????????????????,????????????????,??????

????????????:???? “??????”????

?? ???????????????

????:1???????:????????

2??????????????

3?????????

4?????520

5????????

??????????1?7? ???????????,?6.8?????,????????????,????????????

?????????,????????????????????10????????????1??;10~20???????1???;20~50?????????????????????4?????????4??????????????????1?7?10??43?,????????????????

?????????????????????????,????????????????,??????

????????????:????